APA

RICHARDS JACK HULL JONATHAN PROCTOR SUSAN, . (1990). INTER CHANGE-WORKBOOK 1. : .

Chicago

RICHARDS JACK HULL JONATHAN PROCTOR SUSAN, . 1990. INTER CHANGE-WORKBOOK 1. : .

Harvard

RICHARDS JACK HULL JONATHAN PROCTOR SUSAN, . (1990). INTER CHANGE-WORKBOOK 1. : .

MLA

RICHARDS JACK HULL JONATHAN PROCTOR SUSAN, . INTER CHANGE-WORKBOOK 1. : . 1990.