APA Style
Engel, Heinrich. (1967).
Structure Systems .
New York:
VNR.
Chicago Style
Engel, Heinrich.
Structure Systems.
New York:
VNR,
1967.
Teks.
MLA Style
Engel, Heinrich.
Structure Systems.
New York:
VNR,
1967.
Teks.
Turabian Style
Engel, Heinrich.
Structure Systems.
New York:
VNR,
1967.
Teks.