APA (7th ed.) Citation

Caldecott, R. (2011). R. Caldecott's Picture Book (No. 1). Project Gutenberg.

Chicago Style (17th ed.) Citation

Caldecott, Randolph. R. Caldecott's Picture Book (No. 1). Project Gutenberg, 2011.

MLA (9th ed.) Citation

Caldecott, Randolph. R. Caldecott's Picture Book (No. 1). Project Gutenberg, 2011.

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