Bildnachweise.

Bilder, Referenzen, Was wir tun, Team:
Oliver Berkhausen, Fotograf Bremen/Oldenburg, www.berkhausen.de
Photographybent (Bent Hertema), www.instagram.com/photographybent/

Weitere Quellen:
Apple iMac Mock-Up - lucasalexander.org
New MacBook Photorealistic Vector Mockup - graphicriver.net
iPhone 5S - dribbble.com (Alex Steven)
iPhone 6 PLUS, 5.5-inch mockups - dribbble.com (Ramotion)
Macbook pro photorealistic mockup set - oxygenna.com
Nexus 5 Mockup - dribbble.com (Kreativa Studio)
A4 Paper MockUp - graphicburger.com
A4 Paper Mock-Up Vol7 - pixeden.com​
Magazine Mockup - eamejia.com
Magazine Mockup Vol9 - pixeden.com​
Brochure Mock-up - behance.net (Michael Wood)
Photorealistic Catalogue Magazine Mock-up - behance.net (graphics egg)
Photorealistic Magazine MockUp #2 - graphicburger.com
Flying Business Cards Mockup Vol.12 - graphberry.com
Business Card Mock-Up Vol34 - pixeden.com
Floating Business Card Mockup - designlazy.com
Vintage invitation template Free Vector - freepik.com​
Bi-fold flyer mockup of modern shapes - freepik.com
Realistic white book template - freepik.com
Responsive devices mockup - freepik.com
Three roll ups presentation - freepik.com
Laptop mock up - freepik.com
Imac mockup - freepik.com (graphictwister)
Imac mockups - freepik.com (graphictwister)
Weiß App ui-Kit für mobile - freepik.com (tempees)
iPhone 6 PSD Mockup - graphicsoulz.com
PSD Macbook Air + Thunderbolt Display - dribbble.com (Jozef Mak)
Responsive Showcase - pixeden.com
Tri Fold Brochure - medialoot.com (Tony Thomas)
Free MacBook Pro Photo Mock-up - designbolts.com
Macbook Air Mockup Free PSD Graphics - psd.graphics
Elegant Macbook Pro MockUps - creativemarket.com/zanilic
Free macbook psd mockup - behance.net (Akruti Chhatbar)
Mock-up of macbookpro - freepik.com
Macbook pro Mockup - pixeldima.com (CC BY 3.0)
Photo camera settings screen design - Johndory - Freepik.com
Plant growing in a bulb - jannoon028 - Freepik.com