APA (7th ed.) Citation

Guillen, K., & Rush, B. (2010). Don't feed algae to your cactus. Katherine Guilllen and Brian Rush.

Chicago Style (17th ed.) Citation

Guillen, Katherine, and Brian Rush. Don't Feed Algae to Your Cactus. [Calif.?]: Katherine Guilllen and Brian Rush, 2010.

MLA (9th ed.) Citation

Guillen, Katherine, and Brian Rush. Don't Feed Algae to Your Cactus. Katherine Guilllen and Brian Rush, 2010.