Gaya APA
Sudman, Seymour. (1982).
Asking Questions (1).
London:
Jossey- bass.
Gaya Chicago
Sudman, Seymour.
Asking Questions.
1
London:
Jossey- bass,
1982.
Text.
Gaya MLA
Sudman, Seymour.
Asking Questions.
1
London:
Jossey- bass,
1982.
Text.
Gaya Turabian
Sudman, Seymour.
Asking Questions.
1
London:
Jossey- bass,
1982.
Print.