APA (7th ed.) Citation

Willoughby, H. (2012). Australian Pictures Drawn with Pen and Pencil. Project Gutenberg.

Chicago Style (17th ed.) Citation

Willoughby, Howard. Australian Pictures Drawn with Pen and Pencil. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Willoughby, Howard. Australian Pictures Drawn with Pen and Pencil. Project Gutenberg, 2012.

Warning: These citations may not always be 100% accurate.