APA (7th ed.) Citation

Schafer, J. (2011). Helicopter maintenance study guide: Questions and answers. International Aviation Publishers.

Chicago Style (17th ed.) Citation

Schafer, Joseph. Helicopter Maintenance Study Guide: Questions and Answers. Eaglewood, CO: International Aviation Publishers, 2011.

MLA (9th ed.) Citation

Schafer, Joseph. Helicopter Maintenance Study Guide: Questions and Answers. International Aviation Publishers, 2011.

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