APA
Langer R. H. M., . (1990). Pastures, their ecology and management. Auckland: Oxford University Press.
Chicago
Langer R H M, . 1990. Pastures, their ecology and management. Auckland: Oxford University Press.
Harvard
Langer R. H. M., . (1990). Pastures, their ecology and management. Auckland: Oxford University Press.
MLA
Langer R H M, . Pastures, their ecology and management. Auckland: Oxford University Press. 1990.