Dublin :
a travellers' companion /
selected and introduced by Thomas and Valerie Pakenham.

APA Citation

Pakenham, V., Pakenham, T. (1988). Dublin: a travellers' companion. London: Constable.

MLA Citation

Pakenham, Valerie, and Thomas Pakenham. Dublin: a Travellers' Companion. London: Constable, 1988.

Warning: These citations may not always be complete (especially for serials).