Cita APA (7th ed.)

Glenn, J. (1964). Letters to John Glenn, with comments by John H. Glenn, Jr. World Book Encyclopedia Science Service.

Cita Chicago (17th ed.)

Glenn, John. Letters to John Glenn, with Comments by John H. Glenn, Jr. Houston, Texas: World Book Encyclopedia Science Service, 1964.

Cita MLA (9th ed.)

Glenn, John. Letters to John Glenn, with Comments by John H. Glenn, Jr. World Book Encyclopedia Science Service, 1964.