Gaya APA
Johnson, Robert. (1939).
Elementary Statistics (6).
USA:
PWS-KENT Publishing Company.
Gaya Chicago
Johnson, Robert.
Elementary Statistics.
6
USA:
PWS-KENT Publishing Company,
1939.
Text.
Gaya MLA
Johnson, Robert.
Elementary Statistics.
6
USA:
PWS-KENT Publishing Company,
1939.
Text.
Gaya Turabian
Johnson, Robert.
Elementary Statistics.
6
USA:
PWS-KENT Publishing Company,
1939.
Print.