APA ציטוט

Ryder, R., Lyons, J. P., Campbell, H., & Gough, J. (1970). Emphysema in Coal Workers' Pneumoconiosis.

Citação norma Chicago

Ryder, R., J. P. Lyons, H. Campbell, and J. Gough. Emphysema in Coal Workers' Pneumoconiosis. 1970.

ציטוט MLA

Ryder, R., J. P. Lyons, H. Campbell, and J. Gough. Emphysema in Coal Workers' Pneumoconiosis. 1970.