Gaya APA
Napa, Pieter A.. (1991).
Vocabulary Development Skills .
Yogyakarta:
Penerbit Kanisius.
Gaya Chicago
Napa, Pieter A..
Vocabulary Development Skills.
Yogyakarta:
Penerbit Kanisius,
1991.
Text.
Gaya MLA
Napa, Pieter A..
Vocabulary Development Skills.
Yogyakarta:
Penerbit Kanisius,
1991.
Text.
Gaya Turabian
Napa, Pieter A..
Vocabulary Development Skills.
Yogyakarta:
Penerbit Kanisius,
1991.
Print.