APA-referens (7:e uppl.)

Não informado. (1969). Highways & Traffic Engineering. IPC Building and Contract Journals.

Chicago-referens (17:e uppl.)

Não informado. Highways & Traffic Engineering. London: IPC Building and Contract Journals, 1969.

MLA-referens (8:e uppl.)

Não informado. Highways & Traffic Engineering. IPC Building and Contract Journals, 1969.

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