Gaya APA
Lansing, J, B., Blood, D.
(1983).
The travel market 1955 1957
(
1983)
.
:
Michigan : Survey Research Center,.
Gaya MLA
Lansing, John, B., Blood, Dwight.
"The travel market 1955 1957".
1983
:
Michigan : Survey Research Center,,
1983.
Text.