Cita APA (7th ed.)

Goldschneider, G., & Goldschneider, A. (1994). The secret language of birthdays: Personology profiles for each day of the year. Penguin Studio.

Cita Chicago (17th ed.)

Goldschneider, Gary, i Aron Goldschneider. The Secret Language of Birthdays: Personology Profiles for Each Day of the Year. New York: Penguin Studio, 1994.

Cita MLA (9th ed.)

Goldschneider, Gary, i Aron Goldschneider. The Secret Language of Birthdays: Personology Profiles for Each Day of the Year. Penguin Studio, 1994.