APA Style
Oral proficiency. (1981).
[s.l]:
Evans Brothers Limited.
Chicago Style
Oral proficiency.
1st ed.
[s.l]:
Evans Brothers Limited,
1981.
Text.
MLA Style
Oral proficiency.
1st ed.
[s.l]:
Evans Brothers Limited,
1981.
Text.
Turabian Style
Oral proficiency.
[s.l]:
Evans Brothers Limited,
1981.
Print.