Gaya APA

Winchell, H., Wincheel, A, N. (1951). Elements Of Optical Mineralogy: An Introduction To Microscopic Petrography Part II Descriptions Of Minerals (Ed. 4). New York: John Wiley & Sons inc.

Gaya MLA

Winchell, Horace., Wincheel, Alexander, N,. "Elements Of Optical Mineralogy: An Introduction To Microscopic Petrography Part II Descriptions Of Minerals". Ed. 4 New York: John Wiley & Sons inc, 1951. Text.