Gaya APA

Winchell, A, N. (1951). Elements of Optical Mineralogy; an Introduction to Microscopic Petrograpy 2nd .ed Part III . London: John Wiley and Sons, Inc..

Gaya MLA

Winchell, Alexander, N.. "Elements of Optical Mineralogy; an Introduction to Microscopic Petrograpy 2nd .ed Part III". London: John Wiley and Sons, Inc., 1951. Text.