Gaya APA

Lansing, J, B., Blood, D. (1970). The travel market 1958 1959 1960 1961 1962 (1970). : Michigan : Survey Research Center,.

Gaya MLA

Lansing, John, B., Blood, Dwight. "The travel market 1958 1959 1960 1961 1962". 1970 : Michigan : Survey Research Center,, 1970. Text.