Gaya APA
Peale, N, V. (1959).
The power of positive thinking. Cet.I 1952 .
Englewood Cliffs:
Englewood Cliffs Prentice-Hall.
Gaya MLA
Peale, Norman, Vincent.
"The power of positive thinking. Cet.I 1952 ".
Englewood Cliffs:
Englewood Cliffs Prentice-Hall,
1959.
Buku.