Ahamed, S., Awiti, A., Palm, C., & Sanchez, P. Soils: A contemporary perspective.
Chicago Style aipamenaAhamed, Sonya., Alex Awiti, Cheryl Palm, và Pedro Sanchez. Soils: A Contemporary Perspective.
MLA aipamenaAhamed, Sonya., Alex Awiti, Cheryl Palm, và Pedro Sanchez. Soils: A Contemporary Perspective.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.