Gaya APA
Cassidy, S.
(1978).
Audacity to believe, repr.ed. Cet.pertama 1977.
.
London:
William Collins Sons and Co.
Gaya MLA
Cassidy, Sheila..
"Audacity to believe, repr.ed. Cet.pertama 1977. ".
London:
William Collins Sons and Co,
1978.
Buku.