Fryske, Akademij
Provinciaal Bestuur, [date of publication not identified]
Buku Teks
daab,
Buku Referensi
Designerbooks, [date of publication not identified]
Buku Referensi
American Society of Civil Engineers, 2018
Majalah, Jurnal, Buletin
edited by Andreas C. Papadakis
VCH Publishers,
Buku Referensi