(1970). Pneumoconiosis; proceedings of the international conference, Johannesburg, 1969. Edited by H.A. Shapiro.
芝加哥风格引文Pneumoconiosis; Proceedings of the International Conference, Johannesburg, 1969. Edited by H.A. Shapiro. 1970.
MLA引文Pneumoconiosis; Proceedings of the International Conference, Johannesburg, 1969. Edited by H.A. Shapiro. 1970.
警告：这些引文格式不一定是100％准确.