APA
Gerhold H D Ed, International conference on breeding pest resistant trees (1964 : Peunsylvania) & Schreiner E J Ed. (1966). Proceeding on breeding pestresistant trees. Oxford: Pergamon Press.
Chicago
Gerhold H D Ed, International conference on breeding pest resistant trees (1964 : Peunsylvania) and Schreiner E J Ed. 1966. Proceeding on breeding pestresistant trees. Oxford: Pergamon Press.
Harvard
Gerhold H D Ed, International conference on breeding pest resistant trees (1964 : Peunsylvania) and Schreiner E J Ed. (1966). Proceeding on breeding pestresistant trees. Oxford: Pergamon Press.
MLA
Gerhold H D Ed, International conference on breeding pest resistant trees (1964 : Peunsylvania) and Schreiner E J Ed. Proceeding on breeding pestresistant trees. Oxford: Pergamon Press. 1966.
