APA
Hillier Parker Research, . (1981). Multiple shop branch numbers. - February 1981. London: Hillier Parker May and Rowden.
Chicago
Hillier Parker Research, . 1981. Multiple shop branch numbers. - February 1981. London: Hillier Parker May and Rowden.
Harvard
Hillier Parker Research, . (1981). Multiple shop branch numbers. - February 1981. London: Hillier Parker May and Rowden.
MLA
Hillier Parker Research, . Multiple shop branch numbers. - February 1981. London: Hillier Parker May and Rowden. 1981.