APA način citiranja

Pennington, D. E. (1942). Purines as Growth Requirements of Spirillum Serpens.

Čikaški stil citiranja

Pennington, Derrol E. Purines As Growth Requirements of Spirillum Serpens. 1942.

MLA način citiranja

Pennington, Derrol E. Purines As Growth Requirements of Spirillum Serpens. 1942.

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