APA Style
Kummel, Bernhard. (1961).
History of the earth: an introduction to historical geology .
San Fransisco:
WHFreeman.
Chicago Style
Kummel, Bernhard.
History of the earth: an introduction to historical geology.
San Fransisco:
WHFreeman,
1961.
Text.
MLA Style
Kummel, Bernhard.
History of the earth: an introduction to historical geology.
San Fransisco:
WHFreeman,
1961.
Text.
Turabian Style
Kummel, Bernhard.
History of the earth: an introduction to historical geology.
San Fransisco:
WHFreeman,
1961.
Print.