APA (7th ed.) Citation

Heinlein, R. A. (2011). The Heinlein letters. Virginia Edition, Inc..

Chicago Style (17th ed.) Citation

Heinlein, Robert A. The Heinlein Letters. Houston, Tex.: Virginia Edition, Inc., 2011.

MLA (9th ed.) Citation

Heinlein, Robert A. The Heinlein Letters. Virginia Edition, Inc., 2011.

Warning: These citations may not always be 100% accurate.