Gaya APA
Teaching Foreign-Language Skills. (1970).
Chicago:
[s.n.].
Gaya Chicago
Teaching Foreign-Language Skills.
; 3.
Chicago:
[s.n.],
1970.
Text.
Gaya MLA
Teaching Foreign-Language Skills.
; 3.
Chicago:
[s.n.],
1970.
Text.
Gaya Turabian
Teaching Foreign-Language Skills.
Chicago:
[s.n.],
1970.
Print.