Cita APA (7th ed.)

Holroyd, J. E. (1967). Seventeen steps to 221B: A collection of Sherlockian pieces by English writers. Allen & Unwin.

Cita Chicago (17th ed.)

Holroyd, James Edward. Seventeen Steps to 221B: A Collection of Sherlockian Pieces by English Writers. London: Allen & Unwin, 1967.

Cita MLA (8th ed.)

Holroyd, James Edward. Seventeen Steps to 221B: A Collection of Sherlockian Pieces by English Writers. Allen & Unwin, 1967.