APA

Hockney D., Landau R. & Henderson S. (1981). Billboard Art. : .

Chicago

Hockney David, Landau Robert and Henderson Sally. 1981. Billboard Art. : .

Harvard

Hockney D., Landau R. and Henderson S. (1981). Billboard Art. : .

MLA

Hockney David, Landau Robert and Henderson Sally. Billboard Art. : . 1981.