APA (7th ed.) Citation

Riley, C. V. (2012). Directions for Collecting and Preserving Insects. Project Gutenberg.

Chicago Style (17th ed.) Citation

Riley, C. V. Directions for Collecting and Preserving Insects. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Riley, C. V. Directions for Collecting and Preserving Insects. Project Gutenberg, 2012.

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