Robertson, S., & Bertling, T. How to draw: Drawing and sketching objects and environments from your imagination.
Цитирование в стиле Чикаго (17-е изд.)Robertson, Scott, и Thomas Bertling. How to Draw: Drawing and Sketching Objects and Environments from Your Imagination.
Цитирование MLA (8-е изд.)Robertson, Scott, и Thomas Bertling. How to Draw: Drawing and Sketching Objects and Environments from Your Imagination.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.