APA (7 ম সংস্করণ) উদ্ধৃতি

Warren Penn, R. Foreword to Brother to Dragons: A Play in Two Acts / Robert Warren Penn. Robert Penn Warren's "Brother to Dragons" : a discussion.(1983).

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Warren Penn, Robert. "Foreword to Brother to Dragons: A Play in Two Acts / Robert Warren Penn." Robert Penn Warren's "Brother to Dragons" : A Discussion.(1983) .

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

Warren Penn, Robert. "Foreword to Brother to Dragons: A Play in Two Acts / Robert Warren Penn." Robert Penn Warren's "Brother to Dragons" : A Discussion.(1983), .