Gaya APA
Elements Of Trigonometry. (1968).
USA:
Harcourt.
Gaya Chicago
Elements Of Trigonometry.
.
USA:
Harcourt,
1968.
Buku.
Gaya MLA
Elements Of Trigonometry.
.
USA:
Harcourt,
1968.
Buku.
Gaya Turabian
Elements Of Trigonometry.
USA:
Harcourt,
1968.
Buku.