Gaya APA
Hartley, B., Viney, P. (1980).
Streamline English: Departures: Workbook B Units 41-80 .
Oxford:
Oxford University Press.
Gaya MLA
Hartley, Bernard., Viney, Peter.
"Streamline English: Departures: Workbook B Units 41-80".
Oxford:
Oxford University Press,
1980.
Text.