NULL. (1969). Selected Lectures of THE ROYAL SOCIETY. THE ROYAL SOCIETY and ACADEMIC PRESS.
استشهاد بنمط شيكاغوNULL. Selected Lectures of THE ROYAL SOCIETY. LONDON & NEW YORK: THE ROYAL SOCIETY and ACADEMIC PRESS, 1969.
MLA استشهادNULL. Selected Lectures of THE ROYAL SOCIETY. THE ROYAL SOCIETY and ACADEMIC PRESS, 1969.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.