Gaya APA
Frailey, L.E., Mamchak, Susan P. (1989).
Handbook of business letters (3e).
Englewood CliffNJ:
Prentice-Hall.
Gaya Chicago
Frailey, L.E., Mamchak, Susan P.
Handbook of business letters.
3e
Englewood CliffNJ:
Prentice-Hall,
1989.
Buku.
Gaya MLA
Frailey, L.E., Mamchak, Susan P.
Handbook of business letters.
3e
Englewood CliffNJ:
Prentice-Hall,
1989.
Buku.
Gaya Turabian
Frailey, L.E., Mamchak, Susan P.
Handbook of business letters.
3e
Englewood CliffNJ:
Prentice-Hall,
1989.
Buku.