Não informado. (2022). Pit and Quarry. Advanstar Communications.
Chicago-viite (17. p.)Não informado. Pit and Quarry. Cleveland, Ohio: Advanstar Communications, 2022.
MLA-viite (8. p.)Não informado. Pit and Quarry. Advanstar Communications, 2022.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.