APA Format
Crane, Eva; Walker, Penelope. (1984).
Pollination directory for world crops / Eva Crane and Penelope Walker
. London :: International Bee Research Association,.
MLA Format
Crane, Eva; Walker, Penelope.
Pollination directory for world crops / Eva Crane and Penelope Walker
. London :: International Bee Research Association,, 1984
Chicago Format
Crane, Eva; Walker, Penelope. Pollination directory for world crops / Eva Crane and Penelope Walker. London :: International Bee Research Association,, 1984.