Cita APA (7a ed.)

Armstrong, E. C. R. (1913). Irish Seal-Matrices and seals: By E. C. R. Armstrong. Hodges & Figgis.

Cita Chicago Style (17a ed.)

Armstrong, E. C. R. Irish Seal-Matrices and Seals: By E. C. R. Armstrong. Dublin: Hodges & Figgis, 1913.

Cita MLA (8a ed.)

Armstrong, E. C. R. Irish Seal-Matrices and Seals: By E. C. R. Armstrong. Hodges & Figgis, 1913.