Bloomfield, D. (1920). Labor maintenance: A practical handbook of employees' service work. Ronald Press.
Lua i Stíl Chicago (17ú heag.)Bloomfield, Daniel. Labor Maintenance: A Practical Handbook of Employees' Service Work. New York: Ronald Press, 1920.
Lua MLA (8ú heag.)Bloomfield, Daniel. Labor Maintenance: A Practical Handbook of Employees' Service Work. Ronald Press, 1920.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.