Lua APA (7ú heag.)

MACCOLLUM, D. V. Construction safety planning#David V. MacCollum. Van Nostrand reinhold.

Lua i Stíl Chicago (17ú heag.)

MACCOLLUM, David V. Construction Safety Planning#David V. MacCollum. Van Nostrand reinhold.

Lua MLA (8ú heag.)

MACCOLLUM, David V. Construction Safety Planning#David V. MacCollum. Van Nostrand reinhold.

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