References

We use a variety of sources to put together the house rules for the games that we play. our main sources are listed below. In deciding the rules that we follow for each game, we take into account information available from all of these sources. Often there are many variations, and different sources can conflict in some details. In these cases, we follow the rules that most closely match the mobile Apps that we use to play the game or the rules published by any relevant groups or associations in the country of origin.

Pagat.com
By far the best card game site

Wikipedia

Card Manufacturer Websites e.g.
….Fournier

Encyclopedia Britannica

Books found at local libraries

Apps found on android and iOS

Expert playing groups at local clubs e.g.
….Brisbane German Club
….Queensland Swiss Society
….Brisbane Dutch Club

International Groups / Associations e.g.
….Hungarian Ulti Federation
….Slovenian Tarock Association
….Schafkopf School Germany
….French Tarot Federation
….Danish L’Hombre Union
….Skat Players Association