Harker, A. (1919). Petrology for students: An introduction to the study of rocks under the microscope (5th ed., rev.). The University Press.
芝加哥风格引文Harker, Alfred. Petrology for Students: An Introduction to the Study of Rocks Under the Microscope. 5th ed., rev. Cambridge [Eng.]: The University Press, 1919.
MLA引文Harker, Alfred. Petrology for Students: An Introduction to the Study of Rocks Under the Microscope. 5th ed., rev. The University Press, 1919.
警告:这些引文格式不一定是100%准确.