APA Style

Burgess, E, W, (, W., Park, R, E. (2021). Introduction to the Science of Sociology (Cet. 1). United States of America: Project Gutenberg.

MLA Style

Burgess, E., W., (Ernest, Watson),., Park, Robert, Ezra. "Introduction to the Science of Sociology". Cet. 1 United States of America: Project Gutenberg, 2021. Computer File.