APA (7th ed.) Citation

Helm, N. L., & Parker, F. W. (2004). Uncle Robert's Geography (Uncle Robert's Visit, V.3). Project Gutenberg.

Chicago Style (17th ed.) Citation

Helm, Nellie Lathrop, and Francis W. Parker. Uncle Robert's Geography (Uncle Robert's Visit, V.3). Project Gutenberg, 2004.

MLA (9th ed.) Citation

Helm, Nellie Lathrop, and Francis W. Parker. Uncle Robert's Geography (Uncle Robert's Visit, V.3). Project Gutenberg, 2004.

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