APA (7e ed.) Bronvermelding

Robertson, S., & Bertling, T. How to draw: Drawing and sketching objects and environments from your imagination.

Chicago (17e ed.) Bronvermelding

Robertson, Scott, en Thomas Bertling. How to Draw: Drawing and Sketching Objects and Environments from Your Imagination.

MLA (8e ed.) Bronvermelding

Robertson, Scott, en Thomas Bertling. How to Draw: Drawing and Sketching Objects and Environments from Your Imagination.

Let op: Deze citaties zijn niet altijd 100% accuraat.