APA (7th ed.) Citation
Johnstone, P., Mandryk, J., & Johnstone, R. (2001). Operation world. Paternoster Lifestyle.
Chicago Style (17th ed.) Citation
Johnstone, Patrick, Jason Mandryk, and Robyn Johnstone. Operation World. Cumbria, UK :: Paternoster Lifestyle, 2001.
MLA (9th ed.) Citation
Johnstone, Patrick, et al. Operation World. Paternoster Lifestyle, 2001.
Warning: These citations may not always be 100% accurate.