Gaya APA

Goldschlager, N., Goldman, M, J. (1989). 1989 Principles of clinical electricardiography (13th ed). Englewood Cliffs, NJ: Prentice Hall.

Gaya MLA

Goldschlager, Nora., Goldman, Mervin, J.. "1989 Principles of clinical electricardiography". 13th ed Englewood Cliffs, NJ: Prentice Hall, 1989. Text.