Cita APA

Gear, J. H. S., & Pitchford, R. J. (1988). Bilharzia in South Africa (2nd ed.). Dept. of National Health and Population Development.

Citación estilo Chicago

Gear, James H. S., and R. J. Pitchford. Bilharzia in South Africa. 2nd ed. Pretoria: Dept. of National Health and Population Development, 1988.

Cita MLA

Gear, James H. S., and R. J. Pitchford. Bilharzia in South Africa. 2nd ed. Dept. of National Health and Population Development, 1988.