Cita APA (7th ed.)
Williams, H., Turner, F. J., & Gilbert, C. M. (1982). Petrography: An introd. to the study of rocks in thin sections. Freeman.
Cita Chicago (17th ed.)
Williams, Howel, Francis John Turner, i Charles Merwin Gilbert. Petrography: An Introd. to the Study of Rocks in Thin Sections. New York: Freeman, 1982.
Cita MLA (9th ed.)
Williams, Howel, et al. Petrography: An Introd. to the Study of Rocks in Thin Sections. Freeman, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.