APA

Spooner M. . D., Mckellen J. . S., . (1975). Commercial correspondence in english. Nairobi: Nelson.

Chicago

Spooner M D, Mckellen J S, . 1975. Commercial correspondence in english. Nairobi: Nelson.

Harvard

Spooner M. . D., Mckellen J. . S., . (1975). Commercial correspondence in english. Nairobi: Nelson.

MLA

Spooner M D, Mckellen J S, . Commercial correspondence in english. Nairobi: Nelson. 1975.