APA Style
Engel, heinrich. (1981).
Structure Systems .
USA:
VAN NOSTRAND REINHOLD COMPANY.
Chicago Style
Engel, heinrich.
Structure Systems.
USA:
VAN NOSTRAND REINHOLD COMPANY,
1981.
Text.
MLA Style
Engel, heinrich.
Structure Systems.
USA:
VAN NOSTRAND REINHOLD COMPANY,
1981.
Text.
Turabian Style
Engel, heinrich.
Structure Systems.
USA:
VAN NOSTRAND REINHOLD COMPANY,
1981.
Print.