APA

Newgarden A., . (1960). The field sales manager: a manual of practice. New York: American Management Association.

Chicago

Newgarden Albert, . 1960. The field sales manager: a manual of practice. New York: American Management Association.

Harvard

Newgarden A., . (1960). The field sales manager: a manual of practice. New York: American Management Association.

MLA

Newgarden Albert, . The field sales manager: a manual of practice. New York: American Management Association. 1960.