Gaya APA
English Language Services, Inc.. (1969).
English 900 : A Basic Course (Workbook Four) (Fourth Printing, 1969).
New York:
The Macmillan Company.
Gaya Chicago
English Language Services, Inc..
English 900 : A Basic Course (Workbook Four).
Fourth Printing, 1969
New York:
The Macmillan Company,
1969.
Text.
Gaya MLA
English Language Services, Inc..
English 900 : A Basic Course (Workbook Four).
Fourth Printing, 1969
New York:
The Macmillan Company,
1969.
Text.
Gaya Turabian
English Language Services, Inc..
English 900 : A Basic Course (Workbook Four).
Fourth Printing, 1969
New York:
The Macmillan Company,
1969.
Print.