Cita APA (7th ed.)

Sapienza, C. M., & Hoffman, B. (2020). Respiratory Muscle Strength Training. Plural Publishing, Incorporated.

Cita Chicago (17th ed.)

Sapienza, Christine M., i Bari Hoffman. Respiratory Muscle Strength Training. San Diego: Plural Publishing, Incorporated, 2020.

Cita MLA (9th ed.)

Sapienza, Christine M., i Bari Hoffman. Respiratory Muscle Strength Training. Plural Publishing, Incorporated, 2020.