Gaya APA

Walls, R, M., Murphy, M, F. (2008,2011). Manual of Emergency Airway Management (3 & 4). : Lippincott Williams & Wilkins.

Gaya MLA

Walls, Ron, M.., Murphy, Michael, F.. "Manual of Emergency Airway Management". 3 & 4 : Lippincott Williams & Wilkins, 2008,2011. Text.