توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Duncan, R. Ideas of the Meaning of form ; Often I am permitted to return to a meadow: Robert Duncan. American Poetologics and Poems by Twentieth-Century Poets.(1996).

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Duncan, Robert. "Ideas of the Meaning of Form ; Often I Am Permitted to Return to a Meadow: Robert Duncan." American Poetologics and Poems by Twentieth-Century Poets.(1996) .

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Duncan, Robert. "Ideas of the Meaning of Form ; Often I Am Permitted to Return to a Meadow: Robert Duncan." American Poetologics and Poems by Twentieth-Century Poets.(1996), .