Lua APA (7ú heag.)
Gudas, J., Joyce, J., & Hackett, E. (1990). Fracture mechanics: Twenty- first symposium. ASTM.
Lua i Stíl Chicago (17ú heag.)
Gudas, J.P, J.A Joyce, agus E.M Hackett. Fracture Mechanics: Twenty- First Symposium. Philadelphia, United State: ASTM, 1990.
Lua MLA (9ú heag.)
Gudas, J.P, et al. Fracture Mechanics: Twenty- First Symposium. ASTM, 1990.
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