Gaya APA

Dobereiner,Johanna, . et al (1978). Limitations and Potensials For Biological Nitrogen Fixation in The Tropics . New York: Plenum Press.

Gaya MLA

Dobereiner,Johanna, . et al. "Limitations and Potensials For Biological Nitrogen Fixation in The Tropics". New York: Plenum Press, 1978. Text.