Gaya APA
Marshall, L, C. et al (1952).
Understanding Yourself and Your World .
Chicago, New York:
Harcourt, Brace and Company, Inc..
Gaya MLA
Marshall, Leon, C.. et al.
"Understanding Yourself and Your World".
Chicago, New York:
Harcourt, Brace and Company, Inc.,
1952.
Koleksi Elektronik.