Gaya APA
Principles of mathematics. (1963).
London:
McGraw-Hill.
Gaya Chicago
Principles of mathematics.
second ed..
London:
McGraw-Hill,
1963.
Buku.
Gaya MLA
Principles of mathematics.
second ed..
London:
McGraw-Hill,
1963.
Buku.
Gaya Turabian
Principles of mathematics.
London:
McGraw-Hill,
1963.
Buku.