Não informado. (1978). Agricultural Reviews and Manuals. Science and Education Administration.
Chicago-Zitierstil (17. Ausg.)Não informado. Agricultural Reviews and Manuals. Berkeley, Calif: Science and Education Administration, 1978.
MLA-Zitierstil (8. Ausg.)Não informado. Agricultural Reviews and Manuals. Science and Education Administration, 1978.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.