Gaya APA
Shepherd, J., al., E. (1972).
Active context english : Reader 2a ( Susan and Peter ) .
Basingstoke:
Macmillan Education Limited.
Gaya MLA
Shepherd, John., al., Et.
"Active context english : Reader 2a ( Susan and Peter )".
Basingstoke:
Macmillan Education Limited,
1972.
Text.