APA Style
Ley, Willy. (1973).
The Poles .
:
Life Nature Library.
Chicago Style
Ley, Willy.
The Poles.
:
Life Nature Library,
1973.
Printed Book.
MLA Style
Ley, Willy.
The Poles.
:
Life Nature Library,
1973.
Printed Book.
Turabian Style
Ley, Willy.
The Poles.
:
Life Nature Library,
1973.
Printed Book.