Gaya APA
Spring, Joel H.. (c2012).
American education (15 ed.).
nyu:
McGraw-Hill.
Gaya Chicago
Spring, Joel H..
American education.
15 ed.
nyu:
McGraw-Hill,
c2012.
Buku.
Gaya MLA
Spring, Joel H..
American education.
15 ed.
nyu:
McGraw-Hill,
c2012.
Buku.
Gaya Turabian
Spring, Joel H..
American education.
15 ed.
nyu:
McGraw-Hill,
c2012.
Buku.