Ermest Satow, Ivor Roberts (ed.), Satow's Guide to diplomatic practice (6th ed., 2011)

Review, H-Diplo: https://issforum.org/essays/PDF/Otte-Roberts.pdf (2010)

Google Books: https://books.google.com/books/about/Satow_s_Diplomatic_Practice.html?id=3yGhDQAAQBAJ

Cambridge: https://www.cambridge.org/core/books/a-guide-to-diplomatic-practice/CE8BCA8ECE89A4F5D89191AA7FC5B0B8

Amazon: https://www.amazon.com/Satows-Diplomatic-Practice-Ivor-Roberts/dp/0199693552

Booksee: http://en.booksee.org/book/1308599 (5th ed. 1979)