APA aipamena

Gullace, G., Savoia, M. T., Ravizza, P., Locatelli, V., Addamiano, P., & Ranzi, C. (1981). Contrast echocardiographic features of pulmonary hypertension and regurgitation.

Chicago Style aipamena

Gullace, G., M T. Savoia, P. Ravizza, V. Locatelli, P. Addamiano, and C. Ranzi. Contrast Echocardiographic Features of Pulmonary Hypertension and Regurgitation. 1981.

MLA aipamena

Gullace, G., et al. Contrast Echocardiographic Features of Pulmonary Hypertension and Regurgitation. 1981.