APA

PIOUS R. M., . (1986). Viewpoints. New York: McGraw-Hill Book.

Chicago

PIOUS Richards M, . 1986. Viewpoints. New York: McGraw-Hill Book.

Harvard

PIOUS R. M., . (1986). Viewpoints. New York: McGraw-Hill Book.

MLA

PIOUS Richards M, . Viewpoints. New York: McGraw-Hill Book. 1986.