Cita APA (7a ed.)

Hopkins, A. L. (1943). Periscope peeks at the world above. Our Sunday Visitor.

Cita Chicago Style (17a ed.)

Hopkins, A. L. Periscope Peeks at the World Above. Huntington, Ind.: Our Sunday Visitor, 1943.

Cita MLA (8a ed.)

Hopkins, A. L. Periscope Peeks at the World Above. Our Sunday Visitor, 1943.