APA
Roayl Tropical Institute, . (1976). Annual report of Royal Tropical Institute. Amsterdam: Royal Tropical Institute.
Chicago
Roayl Tropical Institute, . 1976. Annual report of Royal Tropical Institute. Amsterdam: Royal Tropical Institute.
Harvard
Roayl Tropical Institute, . (1976). Annual report of Royal Tropical Institute. Amsterdam: Royal Tropical Institute.
MLA
Roayl Tropical Institute, . Annual report of Royal Tropical Institute. Amsterdam: Royal Tropical Institute. 1976.