Lua APA (7ú heag.)

HOWARD , J. (1997). I CAN READ ABOUT FOSSILS. TROLL ASSOCIATES.

Lua i Stíl Chicago (17ú heag.)

HOWARD , JOHN. I CAN READ ABOUT FOSSILS. USA: TROLL ASSOCIATES, 1997.

Lua MLA (9ú heag.)

HOWARD , JOHN. I CAN READ ABOUT FOSSILS. TROLL ASSOCIATES, 1997.

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