Harker, A. (1902). Petrology for students: An introduction to the study of rocks under the microscope (3rd ed.). University Press.
芝加哥风格引文Harker, Alfred. Petrology for Students: An Introduction to the Study of Rocks Under the Microscope. 3rd ed. Cambridge: University Press, 1902.
MLA引文Harker, Alfred. Petrology for Students: An Introduction to the Study of Rocks Under the Microscope. 3rd ed. University Press, 1902.
警告：这些引文格式不一定是100％准确.