Ashton, T. S., & Sykes, J. (1967). The coal industry of the eighteenth century (2. ed., with minor revisions and additions to the bibliography.). Kelley.
Chicago-Zitierstil (17. Ausg.)Ashton, T. S., und Joseph Sykes. The Coal Industry of the Eighteenth Century. 2. ed., with minor revisions and additions to the bibliography. New York: Kelley, 1967.
MLA-Zitierstil (9. Ausg.)Ashton, T. S., und Joseph Sykes. The Coal Industry of the Eighteenth Century. 2. ed., with minor revisions and additions to the bibliography. Kelley, 1967.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.