APA استشهاد

Gebhardt, L. (1970). Microbiology (4.). C.v mosby company , saint Louis.

استشهاد بنمط شيكاغو

Gebhardt, L.P. Microbiology. 4. USA: C.v mosby company , saint Louis, 1970.

MLA استشهاد

Gebhardt, L.P. Microbiology. 4. C.v mosby company , saint Louis, 1970.