APA Style
Wallenstein, Gerd D. (1968).
Concep and parctice of product planning .
New York:
American Management Association.
Chicago Style
Wallenstein, Gerd D.
Concep and parctice of product planning.
New York:
American Management Association,
1968.
Buku Teks.
MLA Style
Wallenstein, Gerd D.
Concep and parctice of product planning.
New York:
American Management Association,
1968.
Buku Teks.
Turabian Style
Wallenstein, Gerd D.
Concep and parctice of product planning.
New York:
American Management Association,
1968.
Buku Teks.