APA Style
Letters to Jhon Glenn /. (1964).
Texas:
Texas : World book encyclopedia science service, INC. 1964.
Chicago Style
Letters to Jhon Glenn /.
.
Texas:
Texas : World book encyclopedia science service, INC. 1964,
1964.
Text.
MLA Style
Letters to Jhon Glenn /.
.
Texas:
Texas : World book encyclopedia science service, INC. 1964,
1964.
Text.
Turabian Style
Letters to Jhon Glenn /.
Texas:
Texas : World book encyclopedia science service, INC. 1964,
1964.
Print.