Gaya APA
Bookworm Hobbies. (1990).
Singapore:
Bookworm consultants Pte.Ltd.
Gaya Chicago
Bookworm Hobbies.
.
Singapore:
Bookworm consultants Pte.Ltd,
1990.
Text.
Gaya MLA
Bookworm Hobbies.
.
Singapore:
Bookworm consultants Pte.Ltd,
1990.
Text.
Gaya Turabian
Bookworm Hobbies.
Singapore:
Bookworm consultants Pte.Ltd,
1990.
Print.