Cita APA (7a ed.)

Régamey, P., & Pontifex, M. (1960). What is an angel? Hawthorn books.

Cita Chicago Style (17a ed.)

Régamey, Pie-Raymond, y Mark Pontifex. What Is an Angel? New York: Hawthorn books, 1960.

Cita MLA (9a ed.)

Régamey, Pie-Raymond, y Mark Pontifex. What Is an Angel? Hawthorn books, 1960.