APA ציטוט

O'Grady, M. R., & Allen, D. G. (1990). Exercise in Electrocardiography.

Citação norma Chicago

O'Grady, Michael R., and Dana G. Allen. Exercise in Electrocardiography. 1990.

ציטוט MLA

O'Grady, Michael R., and Dana G. Allen. Exercise in Electrocardiography. 1990.