APA (7th ed.) Citation

Butrous, G. Pulmonary hypertension aetiologies in different parts of the world. Elsevier.

Chicago Style (17th ed.) Citation

Butrous, Ghazwan. Pulmonary Hypertension Aetiologies in Different Parts of the World. Elsevier.

MLA (9th ed.) Citation

Butrous, Ghazwan. Pulmonary Hypertension Aetiologies in Different Parts of the World. Elsevier.

Warning: These citations may not always be 100% accurate.