APA (7th ed.) Citation

Hollingworth, H. L., & Hollingworth, L. S. (2012). Vocational Psychology: Its Problems and Methods. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hollingworth, Harry L., and Leta Stetter Hollingworth. Vocational Psychology: Its Problems and Methods. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Hollingworth, Harry L., and Leta Stetter Hollingworth. Vocational Psychology: Its Problems and Methods. Project Gutenberg, 2012.

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