Gaya APA
Gregg, J, R. (1955).
Gregg shorthand / John Robert Gregg, Louis A. Leslie, Charles E. Zoubek .
:
McGraw-Hill.
Gaya MLA
Gregg, John, Robert.
"Gregg shorthand / John Robert Gregg, Louis A. Leslie, Charles E. Zoubek".
:
McGraw-Hill,
1955.
Referensi.