Cita APA (7a ed.)

Humphries. (2014). Learning American sign language: Levels I & II, beginning and Intermediate (Second, Pearson new international edition.). Pearson.

Cita Chicago Style (17a ed.)

Humphries. Learning American Sign Language: Levels I & II, Beginning and Intermediate. Second, Pearson new international edition. Harlow, Essex, England: Pearson, 2014.

Cita MLA (8a ed.)

Humphries. Learning American Sign Language: Levels I & II, Beginning and Intermediate. Second, Pearson new international edition. Pearson, 2014.