APA引文

O'Grady, M. R., Allen, D. G., Tinsley, D., Houston, D., & Carley, B. (1991). Exercise in Electrocardiography.

Citação norma Chicago

O'Grady, Michael R., Dana G. Allen, Dave Tinsley, Doreen Houston, and Blair Carley. Exercise in Electrocardiography. 1991.

MLA引文

O'Grady, Michael R., et al. Exercise in Electrocardiography. 1991.