Cita APA (7a ed.)

Johnstone, P., Mandryk, J., & Johnstone, R. (2001). Operation world. Paternoster Lifestyle.

Cita Chicago Style (17a ed.)

Johnstone, Patrick, Jason Mandryk, y Robyn Johnstone. Operation World. Cumbria, UK :: Paternoster Lifestyle, 2001.

Cita MLA (9a ed.)

Johnstone, Patrick, et al. Operation World. Paternoster Lifestyle, 2001.