Penggayaan APA
Helfrick. (1983).
Practical repair and maintenance of communications equipment .
New Jersey:
Prentice Hall Internation.
Chicago Style
Helfrick.
Practical repair and maintenance of communications equipment.
New Jersey:
Prentice Hall Internation,
1983.
Text.
MLA Style
Helfrick.
Practical repair and maintenance of communications equipment.
New Jersey:
Prentice Hall Internation,
1983.
Text.
Turabian Style
Helfrick.
Practical repair and maintenance of communications equipment.
New Jersey:
Prentice Hall Internation,
1983.
Print.