APA Style
WAEHRER, Helen Youngelson. ().
Student exercises book .
:
.
Chicago Style
WAEHRER, Helen Youngelson.
Student exercises book.
:
,
.
Text.
MLA Style
WAEHRER, Helen Youngelson.
Student exercises book.
:
,
.
Text.
Turabian Style
WAEHRER, Helen Youngelson.
Student exercises book.
:
,
.
Print.