APA

onwueme i., . (1982). the tropical tuber crops. london: english language book society:john wiley & sons.

Chicago

onwueme i.c, . 1982. the tropical tuber crops. london: english language book society:john wiley & sons.

Harvard

onwueme i., . (1982). the tropical tuber crops. london: english language book society:john wiley & sons.

MLA

onwueme i.c, . the tropical tuber crops. london: english language book society:john wiley & sons. 1982.