APA
Gulick P. S. D., . (1984). International directory of germsplan collections 6.1: tropical and subtropical fruits and tree nuts. Rome: International board for plant and genetic resources.
Chicago
Gulick P Sloten D.H, . 1984. International directory of germsplan collections 6.1: tropical and subtropical fruits and tree nuts. Rome: International board for plant and genetic resources.
Harvard
Gulick P. S. D., . (1984). International directory of germsplan collections 6.1: tropical and subtropical fruits and tree nuts. Rome: International board for plant and genetic resources.
MLA
Gulick P Sloten D.H, . International directory of germsplan collections 6.1: tropical and subtropical fruits and tree nuts. Rome: International board for plant and genetic resources. 1984.