Gaya APA

Foth, H. et al (1982). Laboratory Manual for Introductory Soil Science (6th). Lowa: Wm. C. Brown Company Publishers.

Gaya MLA

Foth, H.D.. et al. "Laboratory Manual for Introductory Soil Science". 6th Lowa: Wm. C. Brown Company Publishers, 1982. Text.