Gaya APA
Johnson, Robert R.. (1976).
Elementary statistics (2nd. ed).
North Scituate:
Duxbury Press.
Gaya Chicago
Johnson, Robert R..
Elementary statistics.
2nd. ed
North Scituate:
Duxbury Press,
1976.
Text.
Gaya MLA
Johnson, Robert R..
Elementary statistics.
2nd. ed
North Scituate:
Duxbury Press,
1976.
Text.
Gaya Turabian
Johnson, Robert R..
Elementary statistics.
2nd. ed
North Scituate:
Duxbury Press,
1976.
Print.