Cita APA (7th ed.)
(1943). Life-Reading Service. Scott, Foresman.
Cita Chicago (17th ed.)
Life-Reading Service. Chicago [usw.]: Scott, Foresman, 1943.
Cita MLA (9th ed.)
Life-Reading Service. Scott, Foresman, 1943.
Atenció: Aquestes cites poden no estar 100% correctes.