Gaya APA
Thornley,G.C. (1977).
Scientific English practice .
:
Longman.
Gaya Chicago
Thornley,G.C.
Scientific English practice.
:
Longman,
1977.
Text.
Gaya MLA
Thornley,G.C.
Scientific English practice.
:
Longman,
1977.
Text.
Gaya Turabian
Thornley,G.C.
Scientific English practice.
:
Longman,
1977.
Print.