APA
RICHARDS JACK HULL JONATHAN PROCTOR SUSAN, . (1990). WORKBOOK. : .
Chicago
RICHARDS JACK HULL JONATHAN PROCTOR SUSAN, . 1990. WORKBOOK. : .
Harvard
RICHARDS JACK HULL JONATHAN PROCTOR SUSAN, . (1990). WORKBOOK. : .
MLA
RICHARDS JACK HULL JONATHAN PROCTOR SUSAN, . WORKBOOK. : . 1990.
