APA
Funk W., Lewis N., . (1966). 30 days to a more powerful vocabulary. New York: Washington Square press, Inc.
Chicago
Funk Wilfred, Lewis Norman, . 1966. 30 days to a more powerful vocabulary. New York: Washington Square press, Inc.
Harvard
Funk W., Lewis N., . (1966). 30 days to a more powerful vocabulary. New York: Washington Square press, Inc.
MLA
Funk Wilfred, Lewis Norman, . 30 days to a more powerful vocabulary. New York: Washington Square press, Inc. 1966.
