Cita APA

Purdy, W. C. (1941). An Introduction to the Microbiology of Water and Sewage for Engineering Students.

Chicago Style Citation

Purdy, W. C. An Introduction to the Microbiology of Water and Sewage for Engineering Students. 1941.

Cita MLA

Purdy, W. C. An Introduction to the Microbiology of Water and Sewage for Engineering Students. 1941.

Atenció: Aquestes cites poden no estar 100% correctes.