Yap, J. P., Jr. (2015). School gradens: Beneficial to schoolchildren and the environment. Agriculture.
Chicago-referens (17:e uppl.)Yap, Julio P., Jr. "School Gradens: Beneficial to Schoolchildren and the Environment." Agriculture 2015.
MLA-referens (9:e uppl.)Yap, Julio P., Jr. "School Gradens: Beneficial to Schoolchildren and the Environment." Agriculture, 2015.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.