APA (7th ed.) Citation

Zwemer, S. M., & Zwemer, A. E. (2005). Topsy-Turvy Land Arabia Pictured for Children. Project Gutenberg.

Chicago Style (17th ed.) Citation

Zwemer, Samuel Marinus, and Amy E. Zwemer. Topsy-Turvy Land Arabia Pictured for Children. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Zwemer, Samuel Marinus, and Amy E. Zwemer. Topsy-Turvy Land Arabia Pictured for Children. Project Gutenberg, 2005.

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