Gaya APA

Lehnus, D, J. (1980). Who's on time : a study of time's covers from March 3, 1923 to January 3, 1977 . New York: Oceana Pub. Co..

Gaya MLA

Lehnus, Donald, J. "Who's on time : a study of time's covers from March 3, 1923 to January 3, 1977". New York: Oceana Pub. Co., 1980. Text.