Gaya APA
Lifting by levers. (1993).
New York:
Thomson Learning.
Gaya Chicago
Lifting by levers.
.
New York:
Thomson Learning,
1993.
Buku.
Gaya MLA
Lifting by levers.
.
New York:
Thomson Learning,
1993.
Buku.
Gaya Turabian
Lifting by levers.
New York:
Thomson Learning,
1993.
Buku.