Hughes, R., & Olsen, J. (1965). Donald Friend: By Robert Hughes. With a foreword by John Olsen. Edwards & Shaw.
Citazione stile Chigago Style (17a edizione)Hughes, Robert, e John Olsen. Donald Friend: By Robert Hughes. With a Foreword by John Olsen. Sydney: Edwards & Shaw, 1965.
Citatione MLA (8a ed.)Hughes, Robert, e John Olsen. Donald Friend: By Robert Hughes. With a Foreword by John Olsen. Edwards & Shaw, 1965.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.