APA

Wren F. L., . (1973). Basic mathematical concepts. New York: McGraw-Hill.

Chicago

Wren Frank Lynwood, . 1973. Basic mathematical concepts. New York: McGraw-Hill.

Harvard

Wren F. L., . (1973). Basic mathematical concepts. New York: McGraw-Hill.

MLA

Wren Frank Lynwood, . Basic mathematical concepts. New York: McGraw-Hill. 1973.