APA aipamena

Derrick Beckett. (1974). An introduction to structural design timber. Surrey university.

Chicago Style aipamena

Derrick Beckett. An Introduction to Structural Design Timber. England: Surrey university, 1974.

MLA aipamena

Derrick Beckett. An Introduction to Structural Design Timber. Surrey university, 1974.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.