Cita APA (7a ed.)

Slatta, R. W. (1990). Cowboys of the Americas. Yale University Press.

Cita Chicago Style (17a ed.)

Slatta, Richard W. Cowboys of the Americas. New Haven [etc.]: Yale University Press, 1990.

Cita MLA (9a ed.)

Slatta, Richard W. Cowboys of the Americas. Yale University Press, 1990.