Babcock, E. B. 1., & Clausen, R. E. 1. (1927). Genetics in relation to agriculture (2nd ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Babcock, Ernest Brown 1877, agus Roy Elwood 1891 Clausen. Genetics in Relation to Agriculture. 2nd ed. New York: McGraw-Hill, 1927.
Lua MLA (9ú heag.)Babcock, Ernest Brown 1877, agus Roy Elwood 1891 Clausen. Genetics in Relation to Agriculture. 2nd ed. McGraw-Hill, 1927.
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