Cite

Expo '98 (1998: Lisbon, Portugal)

MLA

Heller, Alfred E. Expo '98 (1998: Lisbon, Portugal). 1998. https://collections.library.yale.edu/catalog/2029261.

APA, 6th edition

Heller, A. E. (1998). Expo '98 (1998: Lisbon, Portugal). https://collections.library.yale.edu/catalog/2029261.