APA

Grey Advertising Inc, . (1980). Transportation handicapped users and non-users of special transportation systems in four cities. Summary report of a survey. New York, NY: Grey Advertising Inc.

Chicago

Grey Advertising Inc, . 1980. Transportation handicapped users and non-users of special transportation systems in four cities. Summary report of a survey. New York, NY: Grey Advertising Inc.

Harvard

Grey Advertising Inc, . (1980). Transportation handicapped users and non-users of special transportation systems in four cities. Summary report of a survey. New York, NY: Grey Advertising Inc.

MLA

Grey Advertising Inc, . Transportation handicapped users and non-users of special transportation systems in four cities. Summary report of a survey. New York, NY: Grey Advertising Inc. 1980.