Gaya APA
Teaching Economics. (1975).
London:
Heinemann Educational Books.
Gaya Chicago
Teaching Economics.
.
London:
Heinemann Educational Books,
1975.
Buku.
Gaya MLA
Teaching Economics.
.
London:
Heinemann Educational Books,
1975.
Buku.
Gaya Turabian
Teaching Economics.
London:
Heinemann Educational Books,
1975.
Buku.