Cita APA

Johnson, M. R. (2011). Hard to reach: Easy to omit. Prim Care Respir J.

Chicago Style Citation

Johnson, Mark RD. "Hard to Reach: Easy to Omit." Prim Care Respir J 2011.

Cita MLA

Johnson, Mark RD. "Hard to Reach: Easy to Omit." Prim Care Respir J 2011.

Atenció: Aquestes cites poden no estar 100% correctes.