Cita APA (7a ed.)

Block, J. A., & Betrus, M. (1999). 101 best cover letters. McGraw-Hill.

Cita Chicago Style (17a ed.)

Block, Jay A., y Michael Betrus. 101 Best Cover Letters. New York: McGraw-Hill, 1999.

Cita MLA (9a ed.)

Block, Jay A., y Michael Betrus. 101 Best Cover Letters. McGraw-Hill, 1999.