Those areas of modeling have their own guidelines and rules which do not relate to what has been written here. The info in this book is detailed and invaluable.
Many libraries now carry the book, so check there first.
Any bookstore can order it for you if it is not in stock. Wilhelminas is one of the oldest and most well respected agencies in the world, so you can trust the info in this book. It will give you tips on portfolio photos to info on pay scales in various world markets. If you are thinking of signing with any agency - talk to numerous models that are with that agency and listen to what they have to say. Do not just accept an agencies word that they are the best.