APA (7th ed.) Citation

Barrera, A., & Tabayoyong, F. T. (1977). Principles of soil science. s.n.].

Chicago Style (17th ed.) Citation

Barrera, Alfredo, and Filomeno T. Tabayoyong. Principles of Soil Science. [S.l: s.n.], 1977.

MLA (9th ed.) Citation

Barrera, Alfredo, and Filomeno T. Tabayoyong. Principles of Soil Science. s.n.], 1977.