APA Style
Umbreit, Myron H. (1957).
Economics An Introduction to Principles and Problems .
:
.
Chicago Style
Umbreit, Myron H.
Economics An Introduction to Principles and Problems.
:
,
1957.
.
MLA Style
Umbreit, Myron H.
Economics An Introduction to Principles and Problems.
:
,
1957.
.
Turabian Style
Umbreit, Myron H.
Economics An Introduction to Principles and Problems.
:
,
1957.
.