Cita APA

Portnoy, D., Prentis, J., & Richards, G. K. (1981). Penicillin tolerance of human isolates of group C streptococci.

Citación estilo Chicago

Portnoy, D., J. Prentis, y G K. Richards. Penicillin Tolerance of Human Isolates of Group C Streptococci. 1981.

Cita MLA

Portnoy, D., J. Prentis, y G K. Richards. Penicillin Tolerance of Human Isolates of Group C Streptococci. 1981.