APA Edition Citation

Sweetman, H. L. (1958). Principles of biological control. W M C brown company.

Chicago Edition Citation

Sweetman, Harvey L. Principles of Biological Control. Lowa: W M C brown company, 1958.

MLA Edition Citation

Sweetman, Harvey L. Principles of Biological Control. W M C brown company, 1958.

Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.