APA način citiranja

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

Čikaški stil citiranja

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

MLA način citiranja

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

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