APA引文

Asherson, R. A., Angus, H., Mathews, J. A., Meyers, O., & Hughes, G. R. (1991). The progressive systemic sclerosis/systemic lupus overlap: An unusual clinical progression.

Citação norma Chicago

Asherson, R A., H. Angus, J A. Mathews, O. Meyers, and G R. Hughes. The Progressive Systemic Sclerosis/systemic Lupus Overlap: An Unusual Clinical Progression. 1991.

MLA引文

Asherson, R A., et al. The Progressive Systemic Sclerosis/systemic Lupus Overlap: An Unusual Clinical Progression. 1991.