Gaya APA
Developing Skills. (1975).
Yogyakarta:
Kanisius.
Gaya Chicago
Developing Skills.
ed.1.
Yogyakarta:
Kanisius,
1975.
.
Gaya MLA
Developing Skills.
ed.1.
Yogyakarta:
Kanisius,
1975.
.
Gaya Turabian
Developing Skills.
Yogyakarta:
Kanisius,
1975.
.