Cita APA (7th ed.)

Glenn, J. (1964). Letters to John Glenn. World Book Encyclopedia Science Service; book trade distribution by Doubleday.

Cita Chicago (17th ed.)

Glenn, John. Letters to John Glenn. Houston, Tex: World Book Encyclopedia Science Service; book trade distribution by Doubleday, 1964.

Cita MLA (9th ed.)

Glenn, John. Letters to John Glenn. World Book Encyclopedia Science Service; book trade distribution by Doubleday, 1964.