APA (7th ed.) Citation

L. D. Erasmus. (1960). Pulmonary function tests. AOSIS.

Chicago Style (17th ed.) Citation

L. D. Erasmus. Pulmonary Function Tests. AOSIS, 1960.

MLA (9th ed.) Citation

L. D. Erasmus. Pulmonary Function Tests. AOSIS, 1960.

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