Lua APA (7ú heag.)

Guevara, G. B. (1973). Across four generations. United Pub.

Lua i Stíl Chicago (17ú heag.)

Guevara, Guillermo B. Across Four Generations. [Manila: United Pub, 1973.

Lua MLA (9ú heag.)

Guevara, Guillermo B. Across Four Generations. United Pub, 1973.

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