APA (7th ed.) Citation

Harrop, R., & Machacek, J. (2005). Pro Spring. Rob Harrop and Jan Machacek.

Chicago Style (17th ed.) Citation

Harrop, Rob, and Jan Machacek. Pro Spring. Berkeley, CA: Rob Harrop and Jan Machacek, 2005.

MLA (8th ed.) Citation

Harrop, Rob, and Jan Machacek. Pro Spring. Rob Harrop and Jan Machacek, 2005.

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